Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A biodegradable aliphatic-aromatic copolyester composition and its application

A biodegradable and aliphatic technology, applied in the field of polyester compositions, can solve the problems of limited single use, reduce the probability of perforation, improve puncture performance, tear resistance and damage quality of drop impact Improved effect

Active Publication Date: 2016-09-14
KINGFA SCI & TECH CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned degradable plastics have good biodegradability, but due to their own defects, they limit their use alone

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A biodegradable aliphatic-aromatic copolyester composition and its application
  • A biodegradable aliphatic-aromatic copolyester composition and its application
  • A biodegradable aliphatic-aromatic copolyester composition and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0054] Put 8.73 Kg of dimethyl terephthalate and 9 Kg of 1,4-butanediol into the reaction kettle, replace the air in the reaction kettle with nitrogen, raise the temperature to 170°C, and wait until the dimethyl terephthalate is completely After melting, 10 g of isopropyl titanate was added, and the temperature was gradually raised to 180° C. for esterification. After the methanol slipping out reaches the theoretical amount, add 7.96 Kg of adipic acid and 142 g of dodecenylsuccinic acid, continue the reaction until the slipping out water reaches the theoretical amount, add 10 g of isopropyl titanate, and gradually heat up to 230~ 250 ° C, about 30 minutes to reduce the pressure in the reactor to below 60Pa, and continue to react under this condition until the power of the stirring motor reaches the set value. The reaction kettle is filled with high-purity nitrogen, and the melt is extruded through a mouth die, and then drawn and pelletized to obtain an aliphatic-aromatic copol...

Embodiment A2

[0056] Put 11.64Kg of dimethyl terephthalate, 9Kg of 1,4-butanediol, 5.40Kg of adipic acid, and 630g of octenylsuccinic anhydride into the reactor, and gradually raise the temperature to 170 o C, add 20g of n-butyl titanate, after methanol and water have slipped out to reach the theoretical amount, gradually raise the temperature to 230~250 o C, reduce the pressure in the reactor to below 60Pa for about 30 minutes, and continue to react under this condition until the power of the stirring motor reaches the set value; fill the reactor with high-purity nitrogen, press the melt out through the mouth mold, and then pull it Copolyester base material A20 is obtained by stripping and pelletizing; A20 is dried, mixed with 0.6% hexamethylene diisocyanate, reacted in a twin-screw extruder, and pelletized to obtain alkyl side chain aliphatic - Aromatic copolyesters.

[0057] Change the ratio of aromatic dibasic acid, aliphatic dibasic acid and aliphatic dibasic acid containing alkyl / alk...

Embodiment 1~9 and comparative example 1~4

[0062] After mixing the alkyl / alkoxy side chain aliphatic-aromatic copolyester A, the dried thermoplastic starch and the polyhydric alcohol as a plasticizer in a high mixer according to the proportioning in Table 2, use The metering scale is added to the twin-screw extruder at 170~220 o C Extrusion granulation to obtain biodegradable aliphatic-aromatic copolyester composition.

[0063] Table 2 The ratio of biodegradable aliphatic-aromatic copolyester composition P

[0064]

[0065] Table 3 Performance test results of biodegradable aliphatic-aromatic copolyester composition P

[0066]

[0067] As can be seen from Table 2 and Table 3, due to the addition of a specific ratio of alkyl / alkoxy side chain-containing aliphatic dibasic acid ester units, the biodegradation of the film produced by the aliphatic-aromatic copolyester composition The yield strength is improved, which is conducive to improving the puncture performance of agricultural mulch films against crops and wee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a biodegradable aliphatic-aromatic copolyester composition and application thereof. The biodegradable aliphatic-aromatic copolyester composition contains the following ingredients in percentage by mass: A: 60-89% of alkyl / alkoxy side chain-containing aliphatic-aromatic copolyester, B: 10-39% of thermoplastic starch and C: 1-10% of polyalcohol, wherein the A contains the following ingredients in percentage by mass: A1: 44-60% of aromatic polyester unit, A2: 39-55% of straight-chain aliphatic polyester unit and A3: 0.3-3% of alkyl / alkoxy side chain-containing aliphatic dibasic acid ester unit. According to the biodegradable aliphatic-aromatic copolyester composition disclosed by the invention, the alkyl / alkoxy side chain-containing aliphatic dibasic acid ester unit of a specific proportioning ratio is added, so that the yield strength of manufactured films is improved, the improvement of crop and weed puncture resistance of agricultural mulching films is facilitated, and the probability of occurrence of a hole breaking phenomenon is reduced; the oxygen gas permeability is improved, and the water vapor permeability is lowered, so that the manufactured films have better heat preserving and moisture preserving effects as the agricultural mulching films.

Description

technical field [0001] The invention belongs to the technical field of polyester compositions, in particular to a biodegradable aliphatic-aromatic copolyester composition containing alkyl / alkoxy side chains and its application in the agricultural mulch industry. Background technique [0002] At present, most of the plastic films used in agricultural production are synthetic polymers, such as polyethylene (PE), polyvinyl chloride (PVC), etc. While the use of these plastic film materials has brought certain economic benefits to agriculture, it has also caused serious white pollution to the environment. These materials will exist stably in the natural environment for a long time. A large number of mulch film fragments left in the land destroy the soil structure, harden the soil, hinder crops from absorbing water and fertilizers from the soil, and lead to crop yield reduction after long-term use. Recycling mulch from the field is a lot of work and costly, and it is difficult to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/06C08L67/02C08L3/02C08L3/04C08K5/053C08G63/52C08G63/672A01G13/02
Inventor 赵巍焦建叶丹滢苑仁旭熊凯钟宇科徐依斌吴水珠
Owner KINGFA SCI & TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com